Adjustable scaffold



(No Model.)

M. KULL.

ADJUSTABLE SGAFFOLD.

Patented Jan. 15, 1889.

I I l l I I u I I m I n u u u l u v I I u n u I III IIIII'IIA lpllvlllhlnalllall I 1 27 6? Q INVENTUR WITNESSES:

BY 4 'ATTY'S.

N. PETERS. Pholu'Lflhographen Wnshinglon. n.C

' UNITED STATES PATENT UEEICE.

MATTHAUS KULL, OF NE\VARK, NE\V JERSEY.

ADJUSTABLE SCAFl-OLD.

SPECIFICATION forming part of Letters Patent No. 396,163, dated January 15, 1889.

Application filed August 21, 1888. Serial No. 283,349. (No model.)

T0 all whom it may concern.-

Be it known that I, MATTHAUs KULL, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Adjustable Seal-folds; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification. I I

The object of my invention is to simplify the construction of adjustable scaffolds, so as to employ a less number of parts, thereby reducing their cost and rendering them easier of adjustment.

The invention consists in the improved construction of adjustable scaffolds and in the combination and arrangement of parts of the same, as will be hereinafter more fully set forth, and finally pointed out in the several clauses of the claims.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the several figures, Figure 1 is a front or rear view of an adjustable scaffold embodying my improwement. Fig. 2 is an end view showing the arrangement of the standards when a low scaffold is required. Fig. 3 is atop plan View of the cross-bar connecting the standards, with the central portion broken away. Fig. l is a top plan view of the base or support for the standards. Fig. 5 is a section through line 00, Fig. 3; and Fig. (i is a section through line y, Fig. 1.

In said drawings, a a represent bases or supports. 1) b are standards or uprights rigidly secured in said bases, having tongues Z) 19' extending up to or nearly to the under side of bands e e.

0 care adjustable standards or uprights provided with grooves c c, and on their upper ends with square tenons 0 0 Fig. 1. (Z (l are right-angled notches on the edges of said standards, with angular openings, as shown in Figs. 1 and 2.

e e are metallic bands firmly secured to standards I) h and divided into three sections, 6' e e, as shown in Fig. 6, when the device is used as shown in Fig. 2.

ff are loose metal loops or hands for holding the adjustable staudauls c c firmly and secure] y to the fixed standards I) b at any desired elevation, as clearly shown in Fig. l.

g g are adjustable bars for connecting the tops of the adjustable standards 0 c, and provided with square sockets 9 adapted to receive the square teuons c hh are metallic bands for holding said connectingd iars, one of said bands being rigidly secured to one end of one of said bars and the other band being secured to the other bar, as shown in Fig. 1.

'When it is desired to use my improved scafloosened and the adjustable standards withdrawn from the bands. They are then reversed end for end, and are passed through the section e of the band and the tenon inserted in a socket, '1', in the base, as shown in Fig. 4. The notches on both of the standards will then be on the same line, as shown in Fig. 2. The space between the standards will then be equal to the size of the crossbar connecting the standards. The metal loops are then adjusted in the notches at the elevation required and the cross-bar allowed to rest thereon. The cross-bar is made extensible, as shown, so that a scaffold of any width or length can be made.

\Vith my improved scaffold l obtain great simplicity of construction, and'on account of the few parts required it is not liable to get out of order, and is readily and quickly adjusted to any height required.

Having thus described the invention, what I claim as new is 1. The adjustable scaffold herein described, consisting of notched tongued standards se cured to bases and provided with fixed bands, grooved standards adapted to pass through said bands and vertically adjustable on said fixed standards, and metallic loops for holding said adjustable standards when in position, and extensible rods connectingthe tops of said adjustable stz'tndards, substmltially as and for the purposes set forth.

2. In an adjustable scaffold, the combination, with a base or support and a fixed notched stz'mdard, of a vertically-adjnstable notched stamlard, a metallic band rigidly seenred to said fixed standard and provided with notches d (I, to hold said adjustable standard, and adjustable metallic loops for holding said adjustable standard when in position, substamtially as shown, and for the purposes set forth.

3. In an adjustable scaffold, the combination, with a base or support and a fixed notched standard, of a verti(Bally-adjustable notched standard, a metallic band rigidly seenred to said fixed standard and provided with recesses to receive said adjustable standard, adjustable metallic loops for holding said adjustable standard when in position, and rods connecting the tops of said adjustable standard, substantially as and for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 7th day of r-lngust, 198R.

M AT'l l-IAUS K ULL.

\Vitnesses:

ALFRED GARDNER, E. L. SHERMAN. 

